Gainers

Find out what's going on in today's market and bring any questions you have to Benzinga's PreMarket Prep.

Check out these big penny stock gainers and losers

Losers

• Centerra Gold Inc. (NYSE:CGAU) shares fell 17.1% to $5.90 in pre-market trading. Centerra Gold initiated arbitration proceeding against the Kyrgyz Republic.
• SuRo Capital Corp. (NASDAQ:SSSS) fell 11.2% to $13.77 in pre-market trading. SuRo Capital recently reported Q1 results.
• Biomerica, Inc. (NASDAQ:BMRA) fell 10.4% to $3.18 in pre-market trading.
• Marathon Digital Holdings, Inc. (NASDAQ:MARA) shares fell 10.3% to $20.73 in pre-market trading after jumping 17% on Friday.
• Riot Blockchain, Inc. (NASDAQ:RIOT) fell 9.7% to $23.52 in pre-market trading after surging 17% on Friday.
• Greenpro Capital Corp. (NASDAQ:GRNQ) fell 6.5% to $1.16 in pre-market trading after jumping 10% on Friday.
• Canaan Inc. (NASDAQ:CAN) shares fell 6.1% to $9.10 in pre-market trading after jumping 11% on Friday.
• MicroStrategy Incorporated (NASDAQ:MSTR) shares fell 6% to $490.00 in pre-market trading after climbing 7% on Friday.
• United Microelectronics Corporation (NYSE:UMC) fell 6% to $8.05 in pre-market trading.